<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD Journal Publishing DTD v3.0 20080202//EN" "https://jats.nlm.nih.gov/nlm-dtd/publishing/3.0/journalpublishing3.dtd">
<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" article-type="research-article" specific-use="SMUR" dtd-version="3.0" xml:lang="en">
<front>
<journal-meta>
<journal-id journal-id-type="publisher">EGUsphere</journal-id>
<journal-title-group>
<journal-title>EGUsphere</journal-title>
<abbrev-journal-title abbrev-type="publisher">EGUsphere</abbrev-journal-title>
<abbrev-journal-title abbrev-type="nlm-ta">EGUsphere</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub"></issn>
<publisher><publisher-name>Copernicus Publications</publisher-name>
<publisher-loc>Göttingen, Germany</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.5194/egusphere-2024-2994</article-id>
<title-group>
<article-title>Evaluation and updates to the oxidized reactive nitrogen trace gas dry deposition parameterization from the GEOS-Chem CTM, including a pathway for ground surface NO&lt;sub&gt;2&lt;/sub&gt; hydrolysis</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Boys</surname>
<given-names>Brian L.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Martin</surname>
<given-names>Randall V.</given-names>
<ext-link>https://orcid.org/0000-0003-2632-8402</ext-link>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>VandenBoer</surname>
<given-names>Trevor C.</given-names>
<ext-link>https://orcid.org/0000-0001-8926-4237</ext-link>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS, Canada</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Department of Energy, Environmental, and Chemical Engineering, Washington University in St. Louis, MO, USA</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>Department of Chemistry, York University, Toronto, ON, Canada</addr-line>
</aff>
<pub-date pub-type="epub">
<day>09</day>
<month>10</month>
<year>2024</year>
</pub-date>
<volume>2024</volume>
<fpage>1</fpage>
<lpage>49</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2024 Brian L. Boys et al.</copyright-statement>
<copyright-year>2024</copyright-year>
<license license-type="open-access">
<license-p>This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit <ext-link ext-link-type="uri"  xlink:href="https://creativecommons.org/licenses/by/4.0/">https://creativecommons.org/licenses/by/4.0/</ext-link></license-p>
</license>
</permissions>
<self-uri xlink:href="https://egusphere.copernicus.org/preprints/2024/egusphere-2024-2994/">This article is available from https://egusphere.copernicus.org/preprints/2024/egusphere-2024-2994/</self-uri>
<self-uri xlink:href="https://egusphere.copernicus.org/preprints/2024/egusphere-2024-2994/egusphere-2024-2994.pdf">The full text article is available as a PDF file from https://egusphere.copernicus.org/preprints/2024/egusphere-2024-2994/egusphere-2024-2994.pdf</self-uri>
<abstract>
<p>Dry deposition is a major loss pathway for reactive nitrogen species from the atmospheric boundary layer. Represented in chemical transport models (CTMs) as a first-order process, time-varying rate coefficients are parameterized and expressed via species-specific deposition velocities (&lt;em&gt;V&lt;sub&gt;d&lt;/sub&gt;(x&lt;/em&gt;)). We evaluate isolated components of the parameterization for &lt;em&gt;V&lt;sub&gt;d&lt;/sub&gt;&lt;/em&gt; in the GEOS-Chem CTM by extracting the trace gas dry deposition algorithm and reimplementing in single-point-mode to enable more direct comparison to field observations. Resistances to surface uptake follow a modified version of the &amp;lsquo;big-leaf&amp;rsquo; Wesely parameterization, which previous studies have shown applies poorly to off-target species such as NO&lt;sub&gt;2&lt;/sub&gt; under conditions favoring non-stomatal uptake. We evaluate non-stomatal dry deposition of NO&lt;sub&gt;2&lt;/sub&gt; by comparing to eddy covariance observed nocturnal &lt;em&gt;V&lt;sub&gt;d&lt;/sub&gt;(NO&lt;sub&gt;2&lt;/sub&gt;)&lt;/em&gt; over Harvard Forest. We eliminate a large low bias (-80 %) in simulated nocturnal &lt;em&gt;V&lt;sub&gt;d&lt;/sub&gt;(NO&lt;sub&gt;2&lt;/sub&gt;)&lt;/em&gt; by representing NO&lt;sub&gt;2&lt;/sub&gt; heterogeneous hydrolysis on deposition surfaces, paying attention to chemical flux divergence, soil NO emission, as well as canopy surface area effects. Finally, we evaluate the updated oxidized reactive nitrogen (NO&lt;sub&gt;y&lt;/sub&gt;) dry deposition parameterization for GEOS-Chem by comparing to eddy covariance observed &lt;em&gt;V&lt;sub&gt;d&lt;/sub&gt;(NO&lt;sub&gt;y&lt;/sub&gt;)&lt;/em&gt; over Harvard Forest, finding a modest nocturnal low bias (-19 %) remains in simulated &lt;em&gt;V&lt;sub&gt;d&lt;/sub&gt;(NO&lt;sub&gt;y&lt;/sub&gt;)&lt;/em&gt; due to the compensating effects of updates to the calculation of molecular diffusivities (28 % reduction in nocturnal &lt;em&gt;V&lt;sub&gt;d&lt;/sub&gt;(NO&lt;sub&gt;y&lt;/sub&gt;)&lt;/em&gt;) and representation of NO&lt;sub&gt;2&lt;/sub&gt; heterogenous hydrolysis (25 % increase in nocturnal &lt;em&gt;V&lt;sub&gt;d&lt;/sub&gt;(NO&lt;sub&gt;y&lt;/sub&gt;)&lt;/em&gt;). These developments are applicable to models across scales, having important implications for near-surface NO&lt;sub&gt;2&lt;/sub&gt; lifetime through a mechanism involving HONO emission.</p>
</abstract>
<counts><page-count count="49"/></counts>
</article-meta>
</front>
<body/>
<back>
</back>
</article>